Abstract: Latent electrostatic images carried by a photoconductively coated substrate of an electrostatic processor are developed in a magnetic field free development zone by a multicomponent developer. The developer circulates in a path which runs from a lower level of a sump, upwardly through the development zone, and then back to the sump. To that end, there are means below the development zone for propelling the developer upwardly into and through that zone, together with means above the development zone for capturing the excess developer (i.e., the developer not consumed in the development process) emerging from that zone. In one embodiment, there are separate magnetic transport rolls for propelling the developer into the development zone and for recapturing the excess developer. To accomodate that embodiment, a developer containing ferromagnetic carrier particles and toner particles is used.